Patent GB-1067683-A (GB)
Title: Improvements in or relating to series printing machines
IPC: B41L47/18
Filed: 1964-05-12
Abstract: 1,067,683. Addressing machines; feeding and delivering sheets. J. H. STIELOW, [trading as JOHN H. STIELOW]. May 12, 1964 [May 13, 1963], No. 19758/64. Headings B6B, B6D and B6H. [Also in Division B8] Relates to an addressing machine as described in Specification 1,067,682. Sheet feeding.-A driven feed roller 7 and a co-operating nip roller 135, Fig. 2, are provided to feed the sheets beneath the guide rails 6 carrying the printing plates. Fig. 4 shows a section of the feed roller 7 which comprises a shaft 91 upon which is mounted two feeding rollers 89 and 90. The shaft 91 may be driven either intermittently or continuously. A continuously driven sprocket wheel 95 may be coupled to the shaft 91 by a coupling element 100 which is forced into the bore 104 by a conical portion 102 of a piston 103 when an electromagnet 108 is energized. Intermittent drive is obtained with a sprocket 99 which may be driven to and fro with varying amplitude through a one-way clutch 97, 98. A brake member 109 prevents overrun of the shaft 91. The drive of the sprocket 99 is achieved with a control wheel 35, Fig. 1, mounted about the continually driven shaft 27 of the machine. The control wheel 35 (which does not rotate) is a type of swash-plate mechanism fixed to a rotatable shaft 113, with a connecting member 112, Fig. 6. The shaft 113 is mounted in the frame parts 129, 130 of the machine, and is rotated by adjusting a screw 36, Figs. 6 and 7, which displaces a lever 114 fixed to the shaft. By varying the inclination of the control wheel 35 with respect to the axis of the shaft 27, the amplitude of motion of the sprocket-wheel 99 is altered, thereby altering the length of feed. A cylindrical member 116 with a flange 128, Figs. 1 and 6, is mounted for rotation with and axial movement on the shaft 27 (referred to as 117 in Fig. 6). A sensing roller 118 mounted on the member 116 rides on one surface of the fixed control wheel 35, thereby causing a reciprocation of the member 116 on the shaft 27. A roller 120 fixed to a lever 121 pivoted at 122 rides on the surface of the flange 128, thereby causing oscillations of the lever. Attached to the lever 121 is a chain 124, Fig. 6, running over pulleys 125, 126, 228 and 127 to the sprocketwheel 99. The end of the chain is attached to a spring 212. The motion of the chain 124 rotates the sprocket-wheel 99 providing the intermittent feed. The nip roller 135, Figs. 2 and 8, mounted on the lever 138 is periodically brought into engagement with the feeding rollers under the control of a cam 148 mounted on the drive shaft 117. Plate delivery.-The printing plates are delivered from the magazine 3 (see Division B8) along the guide rails 6, Fig. 1, and collected in the collection magazine 4 by downward delivery. The pile support 188, Fig. 12, is indexed downwardly as the pile grows so as to maintain the level of the upper surface of the pile constant. The support 188 has two downward extensions 191 and 233. Pivoted to extension 191 at 193 on a bracket 192 is a lever 194 carrying an electromagnet 195. Two abutments 198 and 199, attached respectively to the electromagnet 195 and support 188, are interconnected by a tension spring 201. A screw 200 adjusts the spacing of the two abutments. Pivoted to the lever 195 at 196 is a pawl 197 having two teeth 205, 206. A threaded spindle 207 is mounted in the framework, Fig. 1, for vertical rotation about its axis 108. The teeth 205 and 206 are separated from one another by a distance which corresponds to a complete multiple of the pitch of the spindle threads plus one half of this pitch. If the magnet 195 is energized when in the position shown in Fig. 12, the tooth 206 moves out of engagement, and tooth 205 moves into engagement with groove 209, thereby lowering the support. De-energization of the magnet will cause a further step down. When the support has to be raised, the lever 194 is pivoted about the pin 193 by lifting the handle 202 attached to the magnet. In this manner both teeth become disengaged from the threaded spindle 207. Fine adjustment of the height of the support 188 may be made by turning the spindle 207 with the aid of the knurled knob 235, Fig. 1.